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gstreamer/ext/mythtv/gstmythtvsrc.c
Renato Filho 2cc043fd9c gmythsrc code rewrite; 
Original commit message from CVS:
gmythsrc code rewrite;
2007-09-03 20:07:17 +00:00

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/*
* GStreamer MythTV Plug-in
* Copyright (C) <2006> Rosfran Borges <rosfran.borges@indt.org.br>
* Copyright (C) <2007> Renato Filho <renato.filho@indt.org.br>
* This library is free software; you can
* redistribute it and/or modify it under the terms of the GNU Library
* General Public License as published by the Free Software Foundation;
* either version 2 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library
* General Public License for more details. You should have received a copy
* of the GNU Library General Public License along with this library; if
* not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite
* 330, Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-mythtvsrc
*
* <refsect2>
* <para>
* MythTVSrc allows to access a remote MythTV backend streaming Video/Audio server,
* and to render audio and video content through a TCP/IP connection to a specific
* port on this server, and based on a known MythTV protocol that is based on
* some message passing, such as REQUEST_BLOCK on a specified number of bytes, to get
* some chunk of remote file data.
* You should pass the information aboute the remote MythTV backend server
* through the <link linkend="GstMythTVSrc--location">location</link> property.
* </para>
* <title>Examples</title>
* <para>
* If you want to get the LiveTV content (set channel, TV tuner, RemoteEncoder,
* Recorder),
* put the following URI:
*
* <programlisting>
* myth://xxx.xxx.xxx.xxx:6543/livetv?channel=BBC
* </programlisting>
*
* This URI will say to the gmyth library to configure the Recorder instance (used to
* change the channel, start the TV multimedia content transmition, etc.), using
* the IP address (xxx.xxx.xxx.xxx) and port number (6543) of the MythTV backend
* server, and setting the channel name to "BBC".
*
* To get a already recorded the MythTV NUV file, put the following URI:
*
* <programlisting>
* myth://xxx.xxx.xxx.xxx:6543/filename.nuv
* </programlisting>
*
* This URI will say to the gmyth library to configure the Recorder instance (used to
* change the channel, start the TV multimedia content transmition, etc.), using
* the IP address (xxx.xxx.xxx.xxx) and port number (6543) of the MythTV backend
* server, and setting the channel name to "BBC".
*
* Another possible way to use the LiveTV content, and just in the case you want to
* use the mysql database, put the location URI in the following format:
*
* <programlisting>
* myth://mythtv:mythtv@xxx.xxx.xxx.xxx:6543/?mythconverg&channel=9
* </programlisting>
*
* Where the first field is the protocol (myth), the second and third are user
* name (mythtv) and password (mythtv), then backend host name and port number,
* and the last field is the database name (mythconverg).
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstmythtvsrc.h"
#include <gmyth/gmyth_file.h>
#include <gmyth/gmyth_file_transfer.h>
#include <gmyth/gmyth_file_local.h>
#include <gmyth/gmyth_livetv.h>
#include <gmyth/gmyth_socket.h>
#include <gmyth/gmyth_tvchain.h>
#include <string.h>
#include <unistd.h>
GST_DEBUG_CATEGORY_STATIC (mythtvsrc_debug);
#define GST_GMYTHTV_ID_NUM 1
#define GST_GMYTHTV_CHANNEL_DEFAULT_NUM (-1)
#define GMYTHTV_VERSION_DEFAULT 30
#define GMYTHTV_TRANSFER_MAX_WAITS 100
#define GMYTHTV_TRANSFER_MAX_RESENDS 2
#define GMYTHTV_TRANSFER_MAX_BUFFER (128*1024)
#define READ_SIZE (14*1024)
#define READ_SIZE_LIVETV (80*1024)
#define GST_FLOW_ERROR_NO_DATA (-101)
static const GstElementDetails gst_mythtv_src_details =
GST_ELEMENT_DETAILS ("MythTV client source",
"Source/Network",
"Control and receive data as a client over the network "
"via raw socket connections using the MythTV protocol",
"Rosfran Borges <rosfran.borges@indt.org.br>,"
"Renato Filho <renato.filho@indt.org.br>");
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
enum
{
PROP_0,
PROP_LOCATION,
PROP_GMYTHTV_VERSION,
PROP_GMYTHTV_LIVE,
PROP_GMYTHTV_LIVEID,
PROP_GMYTHTV_LIVE_CHAINID,
PROP_GMYTHTV_ENABLE_TIMING_POSITION,
PROP_GMYTHTV_CHANNEL_NUM
};
static void gst_mythtv_src_clear (GstMythtvSrc * mythtv_src);
static void gst_mythtv_src_finalize (GObject * gobject);
static GstFlowReturn gst_mythtv_src_create (GstPushSrc * psrc,
GstBuffer ** outbuf);
static gboolean gst_mythtv_src_start (GstBaseSrc * bsrc);
static gboolean gst_mythtv_src_stop (GstBaseSrc * bsrc);
static gboolean gst_mythtv_src_get_size (GstBaseSrc * bsrc, guint64 * size);
static gboolean gst_mythtv_src_is_seekable (GstBaseSrc * push_src);
static gboolean gst_mythtv_src_do_seek (GstBaseSrc * base,
GstSegment * segment);
static GstStateChangeReturn
gst_mythtv_src_change_state (GstElement * element, GstStateChange transition);
static void gst_mythtv_src_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_mythtv_src_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_mythtv_src_uri_handler_init (gpointer g_iface,
gpointer iface_data);
static gboolean gst_mythtv_src_handle_query (GstPad * pad, GstQuery * query);
static gboolean gst_mythtv_src_handle_event (GstPad * pad, GstEvent * event);
static GMythFileReadResult do_read_request_response (GstMythtvSrc * src,
guint size, GByteArray * data_ptr);
static void
_urihandler_init (GType type)
{
static const GInterfaceInfo urihandler_info = {
gst_mythtv_src_uri_handler_init,
NULL,
NULL
};
g_type_add_interface_static (type, GST_TYPE_URI_HANDLER, &urihandler_info);
GST_DEBUG_CATEGORY_INIT (mythtvsrc_debug, "mythtvsrc", 0, "MythTV src");
}
GST_BOILERPLATE_FULL (GstMythtvSrc, gst_mythtv_src, GstPushSrc,
GST_TYPE_PUSH_SRC, _urihandler_init)
static void gst_mythtv_src_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&srctemplate));
gst_element_class_set_details (element_class, &gst_mythtv_src_details);
element_class->change_state = gst_mythtv_src_change_state;
}
static void
gst_mythtv_src_class_init (GstMythtvSrcClass * klass)
{
GObjectClass *gobject_class;
GstPushSrcClass *gstpushsrc_class;
GstBaseSrcClass *gstbasesrc_class;
gobject_class = (GObjectClass *) klass;
gstbasesrc_class = (GstBaseSrcClass *) klass;
gstpushsrc_class = (GstPushSrcClass *) klass;
gobject_class->set_property = gst_mythtv_src_set_property;
gobject_class->get_property = gst_mythtv_src_get_property;
gobject_class->finalize = gst_mythtv_src_finalize;
g_object_class_install_property
(gobject_class, PROP_LOCATION,
g_param_spec_string ("location", "Location",
"The location. In the form:"
"\n\t\t\tmyth://a.com/file.nuv"
"\n\t\t\tmyth://a.com:23223/file.nuv "
"\n\t\t\ta.com/file.nuv - default scheme 'myth'",
"", G_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_GMYTHTV_VERSION,
g_param_spec_int ("mythtv-version", "mythtv-version",
"Change MythTV version", 26, 30, 26, G_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_GMYTHTV_LIVEID,
g_param_spec_int ("mythtv-live-id", "mythtv-live-id",
"Change MythTV version",
0, 200, GST_GMYTHTV_ID_NUM, G_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_GMYTHTV_LIVE_CHAINID,
g_param_spec_string ("mythtv-live-chainid", "mythtv-live-chainid",
"Sets the MythTV chain ID (from TV Chain)", "", G_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_GMYTHTV_LIVE,
g_param_spec_boolean ("mythtv-live", "mythtv-live",
"Enable MythTV Live TV content streaming", FALSE, G_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_GMYTHTV_ENABLE_TIMING_POSITION,
g_param_spec_boolean ("mythtv-enable-timing-position",
"mythtv-enable-timing-position",
"Enable MythTV Live TV content size continuous updating",
FALSE, G_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_GMYTHTV_CHANNEL_NUM,
g_param_spec_string ("mythtv-channel", "mythtv-channel",
"Change MythTV channel number", "", G_PARAM_READWRITE));
gstbasesrc_class->start = gst_mythtv_src_start;
gstbasesrc_class->stop = gst_mythtv_src_stop;
gstbasesrc_class->get_size = gst_mythtv_src_get_size;
gstbasesrc_class->is_seekable = gst_mythtv_src_is_seekable;
gstbasesrc_class->do_seek = gst_mythtv_src_do_seek;
gstpushsrc_class->create = gst_mythtv_src_create;
GST_DEBUG_CATEGORY_INIT (mythtvsrc_debug, "mythtvsrc", 0,
"MythTV Client Source");
}
static void
gst_mythtv_src_init (GstMythtvSrc * this, GstMythtvSrcClass * g_class)
{
this->file = NULL;
this->unique_setup = FALSE;
this->mythtv_version = GMYTHTV_VERSION_DEFAULT;
this->state = GST_MYTHTV_SRC_FILE_TRANSFER;
this->bytes_read = 0;
this->prev_content_size = 0;
this->content_size = 0;
this->read_offset = 0;
this->content_size_last = 0;
this->live_tv = FALSE;
this->enable_timing_position = FALSE;
this->update_prog_chain = FALSE;
this->user_agent = g_strdup ("mythtvsrc");
this->update_prog_chain = FALSE;
this->channel_name = NULL;
this->eos = FALSE;
this->wait_to_transfer = 0;
this->spawn_livetv = NULL;
gst_base_src_set_format (GST_BASE_SRC (this), GST_FORMAT_BYTES);
gst_pad_set_event_function (GST_BASE_SRC_PAD (GST_BASE_SRC (this)),
gst_mythtv_src_handle_event);
gst_pad_set_query_function (GST_BASE_SRC_PAD (GST_BASE_SRC (this)),
gst_mythtv_src_handle_query);
}
static void
gst_mythtv_src_clear (GstMythtvSrc * mythtv_src)
{
mythtv_src->unique_setup = FALSE;
if (mythtv_src->spawn_livetv) {
g_object_unref (mythtv_src->spawn_livetv);
mythtv_src->spawn_livetv = NULL;
}
if (mythtv_src->file) {
g_object_unref (mythtv_src->file);
mythtv_src->file = NULL;
}
if (mythtv_src->backend_info) {
g_object_unref (mythtv_src->backend_info);
mythtv_src->backend_info = NULL;
}
}
static void
gst_mythtv_src_finalize (GObject * gobject)
{
GstMythtvSrc *this = GST_MYTHTV_SRC (gobject);
gst_mythtv_src_clear (this);
if (this->uri_name) {
g_free (this->uri_name);
this->uri_name = NULL;
}
if (this->user_agent) {
g_free (this->user_agent);
this->user_agent = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (gobject);
}
static GMythFileReadResult
do_read_request_response (GstMythtvSrc * src, guint size, GByteArray * data_ptr)
{
gint read = 0;
guint sizetoread = size;
gint max_iters = GMYTHTV_TRANSFER_MAX_RESENDS;
GMythFileReadResult result;
GST_LOG_OBJECT (src, "Starting: Reading %d bytes...", sizetoread);
result = GMYTH_FILE_READ_OK;
/*
* Loop sending the Myth File Transfer request: Retry whilst
* authentication fails and we supply it.
*/
while (sizetoread == size && --max_iters > 0) {
/*
* if ( gmyth_backend_info_is_local_file(src->backend_info) )
*/
if (IS_GMYTH_FILE_LOCAL (src->file))
result = gmyth_file_local_read (GMYTH_FILE_LOCAL (src->file),
data_ptr, sizetoread, src->live_tv);
else if (IS_GMYTH_FILE_TRANSFER (src->file))
result = gmyth_file_transfer_read (GMYTH_FILE_TRANSFER (src->file),
data_ptr, sizetoread, src->live_tv);
if (data_ptr->len > 0) {
read += data_ptr->len;
sizetoread -= data_ptr->len;
} else if (data_ptr->len <= 0) {
if (src->live_tv == FALSE) {
result = GMYTH_FILE_READ_EOF;
goto eos;
} else {
if (result == GMYTH_FILE_READ_ERROR) { /* -314 */
GST_INFO_OBJECT (src, "[LiveTV] FileTransfer READ_ERROR!");
}
goto done;
}
}
/*
* else if (data_ptr->len == 0) goto done;
*/
if (read == sizetoread)
goto done;
}
if ((read < 0 && !src->live_tv) || max_iters == 0) {
result = GMYTH_FILE_READ_EOF;
goto eos;
}
goto done;
eos:
src->eos = TRUE;
done:
return result;
}
static GstFlowReturn
gst_mythtv_src_create (GstPushSrc * psrc, GstBuffer ** outbuf)
{
GstMythtvSrc *src;
GstFlowReturn ret = GST_FLOW_OK;
GByteArray *buffer;
GMythFileReadResult result = GMYTH_FILE_READ_OK;
src = GST_MYTHTV_SRC (psrc);
buffer = g_byte_array_new ();
if (src->live_tv)
result = do_read_request_response (src, READ_SIZE_LIVETV, buffer);
else
result = do_read_request_response (src, READ_SIZE, buffer);
if (result == GMYTH_FILE_READ_ERROR)
goto read_error;
*outbuf = gst_buffer_new ();
GST_BUFFER_SIZE (*outbuf) = buffer->len;
GST_BUFFER_MALLOCDATA (*outbuf) = g_malloc0 (GST_BUFFER_SIZE (*outbuf));
GST_BUFFER_DATA (*outbuf) = GST_BUFFER_MALLOCDATA (*outbuf);
g_memmove (GST_BUFFER_DATA ((*outbuf)), buffer->data,
GST_BUFFER_SIZE (*outbuf));
GST_BUFFER_OFFSET (*outbuf) = src->read_offset;
GST_BUFFER_OFFSET_END (*outbuf) =
src->read_offset + GST_BUFFER_SIZE (*outbuf);
src->read_offset += GST_BUFFER_SIZE (*outbuf);
src->bytes_read += GST_BUFFER_SIZE (*outbuf);
g_byte_array_free (buffer, TRUE);
if (result == GMYTH_FILE_READ_NEXT_PROG_CHAIN) {
GstPad *peer;
peer = gst_pad_get_peer (GST_BASE_SRC_PAD (GST_BASE_SRC (psrc)));
gst_pad_send_event (peer,
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES, 0, -1, 0));
gst_object_unref (peer);
}
if (src->eos || (!src->live_tv && (src->bytes_read >= src->content_size)))
ret = GST_FLOW_UNEXPECTED;
return ret;
read_error:
GST_ELEMENT_ERROR (src, RESOURCE, READ,
(NULL), ("Could not read any bytes (%i, %s)", read, src->uri_name));
return GST_FLOW_ERROR;
}
gint64
gst_mythtv_src_get_position (GstMythtvSrc * src)
{
gint64 size_tmp = 0;
guint max_tries = 2;
if (src->live_tv == TRUE &&
(abs (src->content_size - src->bytes_read) <
GMYTHTV_TRANSFER_MAX_BUFFER)) {
get_file_pos:
g_usleep (10);
size_tmp = gmyth_recorder_get_file_position (src->spawn_livetv->recorder);
if (size_tmp > (src->content_size + GMYTHTV_TRANSFER_MAX_BUFFER))
src->content_size = size_tmp;
else if (size_tmp > 0 && --max_tries > 0)
goto get_file_pos;
GST_LOG_OBJECT (src, "GET_POSITION: file_position = %lld", size_tmp);
/*
* sets the last content size amount before it can be updated
*/
src->prev_content_size = src->content_size;
}
return src->content_size;
}
static gboolean
gst_mythtv_src_do_seek (GstBaseSrc * base, GstSegment * segment)
{
GstMythtvSrc *src = GST_MYTHTV_SRC (base);
gint64 new_offset = -1;
gint64 actual_seek = segment->start;
gboolean ret = TRUE;
GST_LOG_OBJECT (src, "seek, segment: %" GST_SEGMENT_FORMAT, segment);
if (segment->format == GST_FORMAT_TIME) {
goto done;
}
GST_LOG_OBJECT (src,
"Trying to seek at the value (actual_seek = %lld, read_offset = %lld)",
actual_seek, src->read_offset);
/*
* verify if it needs to seek
*/
if (src->read_offset != actual_seek) {
if (IS_GMYTH_FILE_LOCAL (src->file))
new_offset = gmyth_file_local_seek (GMYTH_FILE_LOCAL (src->file),
segment->start, G_SEEK_SET);
else if (IS_GMYTH_FILE_TRANSFER (src->file))
new_offset = gmyth_file_transfer_seek (GMYTH_FILE_TRANSFER (src->file),
segment->start, SEEK_SET);
if (G_UNLIKELY (new_offset < 0)) {
ret = FALSE;
if (!src->live_tv)
goto eos;
}
src->read_offset = new_offset;
if (ret == FALSE) {
GST_INFO_OBJECT (src, "Failed to set the SEEK on segment!");
}
}
done:
return ret;
eos:
GST_DEBUG_OBJECT (src, "EOS found on seeking!!!");
return FALSE;
}
/*
* create a socket for connecting to remote server
*/
static gboolean
gst_mythtv_src_start (GstBaseSrc * bsrc)
{
GstMythtvSrc *src = GST_MYTHTV_SRC (bsrc);
GString *chain_id_local = NULL;
GMythURI *gmyth_uri = NULL;
gboolean ret = TRUE;
GstMessage *msg;
if (src->unique_setup == FALSE) {
src->unique_setup = TRUE;
} else {
goto done;
}
gmyth_uri = gmyth_uri_new_with_value (src->uri_name);
src->backend_info = gmyth_backend_info_new_with_uri (src->uri_name);
src->live_tv = gmyth_uri_is_livetv (gmyth_uri);
if (src->live_tv) {
src->spawn_livetv = gmyth_livetv_new (src->backend_info);
gchar *ch = gmyth_uri_get_channel_name (gmyth_uri);
if (ch != NULL)
src->channel_name = ch;
if (src->channel_name != NULL) {
gboolean result;
result = gmyth_livetv_channel_name_setup (src->spawn_livetv,
src->channel_name);
if (result == FALSE) {
GST_INFO_OBJECT (src, "LiveTV setup felt down on error");
ret = FALSE;
goto init_failed;
}
} else {
if (gmyth_livetv_setup (src->spawn_livetv) == FALSE) {
GST_INFO_OBJECT (src, "LiveTV setup felt down on error");
ret = FALSE;
goto init_failed;
}
}
src->file =
GMYTH_FILE (gmyth_livetv_create_file_transfer (src->spawn_livetv));
if (NULL == src->file) {
GST_INFO_OBJECT (src, "[LiveTV] FileTransfer equals to NULL");
ret = FALSE;
goto init_failed;
}
/*
* Check if the file is local to this specific client renderer
*/
if (gmyth_uri_is_local_file (gmyth_uri))
ret = gmyth_file_local_open (GMYTH_FILE_LOCAL (src->file));
else
ret = gmyth_file_transfer_open (GMYTH_FILE_TRANSFER (src->file),
(src->spawn_livetv->uri != NULL ?
gmyth_uri_get_path (src->spawn_livetv->uri) :
src->spawn_livetv->proginfo->pathname->str));
/*
* sets the mythtvsrc "location" property
*/
g_object_set (src, "location", gmyth_file_get_uri (src->file), NULL);
if (!ret) {
GST_INFO_OBJECT (src,
"Error: couldn't open the FileTransfer from LiveTV source!");
g_object_unref (src->file);
src->file = NULL;
goto init_failed;
}
} /* If live-tv */
else {
/*
* Check if the file is local to this specific client renderer,
* and tries to open a local connection
*/
if (gmyth_uri_is_local_file (gmyth_uri)) {
src->file = GMYTH_FILE (gmyth_file_local_new (src->backend_info));
ret = gmyth_file_local_open (GMYTH_FILE_LOCAL (src->file));
} else {
src->file = GMYTH_FILE (gmyth_file_transfer_new (src->backend_info));
ret =
gmyth_file_transfer_open (GMYTH_FILE_TRANSFER (src->file),
src->uri_name);
}
}
if (NULL == src->file) {
GST_INFO_OBJECT (src, "FileTransfer is NULL");
goto init_failed;
}
if (ret == FALSE) {
GST_INFO_OBJECT (src,
"MythTV FileTransfer request failed when setting up socket connection!");
goto begin_req_failed;
}
GST_INFO_OBJECT (src,
"MythTV FileTransfer filesize = %lld, content_size = %lld!",
gmyth_file_get_filesize (src->file), src->content_size);
src->content_size = gmyth_file_get_filesize (src->file);
msg = gst_message_new_duration (GST_OBJECT (src), GST_FORMAT_BYTES,
src->content_size);
gst_element_post_message (GST_ELEMENT (src), msg);
src->do_start = FALSE;
gst_pad_push_event (GST_BASE_SRC_PAD (GST_BASE_SRC (src)),
gst_event_new_new_segment (TRUE, 1.0,
GST_FORMAT_TIME, 0, src->content_size, 0));
done:
if (gmyth_uri != NULL) {
g_object_unref (gmyth_uri);
gmyth_uri = NULL;
}
if (chain_id_local != NULL) {
g_string_free (chain_id_local, TRUE);
chain_id_local = NULL;
}
return TRUE;
/*
* ERRORS
*/
init_failed:
if (gmyth_uri != NULL) {
g_object_unref (gmyth_uri);
gmyth_uri = NULL;
}
if (src->spawn_livetv != NULL) {
g_object_unref (src->spawn_livetv);
src->spawn_livetv = NULL;
}
GST_ELEMENT_ERROR (src, LIBRARY, INIT,
(NULL),
("Could not initialize MythTV library (%i, %s)", ret, src->uri_name));
gst_mythtv_src_clear (src);
return FALSE;
begin_req_failed:
if (gmyth_uri != NULL) {
g_object_unref (gmyth_uri);
gmyth_uri = NULL;
}
GST_ELEMENT_ERROR (src, LIBRARY, INIT,
(NULL),
("Could not begin request sent to MythTV server (%i, %s)",
ret, src->uri_name));
return FALSE;
}
static gboolean
gst_mythtv_src_get_size (GstBaseSrc * bsrc, guint64 * size)
{
GstMythtvSrc *src = GST_MYTHTV_SRC (bsrc);
gboolean ret = TRUE;
GST_LOG_OBJECT (src,
"Differs from previous content size: %d (max.: %d)",
abs (src->content_size - src->prev_content_size),
GMYTHTV_TRANSFER_MAX_BUFFER);
if (src->live_tv) {
ret = FALSE;
} else if (src->live_tv && src->enable_timing_position
&& (abs (src->content_size - src->bytes_read) <
GMYTHTV_TRANSFER_MAX_BUFFER)) {
gint64 new_offset;
new_offset = gmyth_recorder_get_file_position (src->spawn_livetv->recorder);
if (new_offset > 0 && new_offset > src->content_size) {
src->content_size = new_offset;
} else if (new_offset < src->content_size) {
src->update_prog_chain = TRUE;
}
}
*size = src->content_size;
GST_LOG_OBJECT (src, "Content size = %lld", src->content_size);
return ret;
}
/*
* close the socket and associated resources used both to recover from
* errors and go to NULL state
*/
static gboolean
gst_mythtv_src_stop (GstBaseSrc * bsrc)
{
GstMythtvSrc *src = GST_MYTHTV_SRC (bsrc);
gst_mythtv_src_clear (src);
return TRUE;
}
static gboolean
gst_mythtv_src_handle_event (GstPad * pad, GstEvent * event)
{
GstMythtvSrc *src = GST_MYTHTV_SRC (GST_PAD_PARENT (pad));
gint64 cont_size = 0;
gboolean ret = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
if (src->live_tv) {
cont_size = gst_mythtv_src_get_position (src);
if (cont_size > src->content_size) {
src->content_size = cont_size;
src->eos = FALSE;
} else {
src->eos = TRUE;
gst_element_set_state (GST_ELEMENT (src), GST_STATE_NULL);
gst_element_set_locked_state (GST_ELEMENT (src), FALSE);
}
}
break;
default:
ret = gst_pad_event_default (pad, event);
}
GST_DEBUG_OBJECT (src, "HANDLE EVENT %d", ret);
return ret;
}
static gboolean
gst_mythtv_src_is_seekable (GstBaseSrc * push_src)
{
return TRUE;
}
static gboolean
gst_mythtv_src_handle_query (GstPad * pad, GstQuery * query)
{
gboolean res = FALSE;
GstMythtvSrc *myth = GST_MYTHTV_SRC (gst_pad_get_parent (pad));
GstFormat formt;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
gst_query_parse_position (query, &formt, NULL);
if (formt == GST_FORMAT_BYTES) {
gst_query_set_position (query, formt, myth->read_offset);
GST_DEBUG_OBJECT (myth, "POS %" G_GINT64_FORMAT, myth->read_offset);
res = TRUE;
} else if (formt == GST_FORMAT_TIME) {
res = gst_pad_query_default (pad, query);
}
break;
case GST_QUERY_DURATION:
gst_query_parse_duration (query, &formt, NULL);
if (formt == GST_FORMAT_BYTES) {
gint64 size = myth->content_size;
gst_query_set_duration (query, GST_FORMAT_BYTES, 10);
GST_DEBUG_OBJECT (myth, "SIZE %" G_GINT64_FORMAT, size);
res = TRUE;
} else if (formt == GST_FORMAT_TIME) {
res = gst_pad_query_default (pad, query);
}
break;
default:
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (myth);
return res;
}
static GstStateChangeReturn
gst_mythtv_src_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_FAILURE;
GstMythtvSrc *src = GST_MYTHTV_SRC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
if (!src->uri_name) {
GST_WARNING_OBJECT (src, "Invalid location");
return ret;
}
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
if (src->live_tv) {
if (!gmyth_recorder_send_frontend_ready_command
(src->spawn_livetv->recorder))
GST_WARNING_OBJECT (src,
"Couldn't send the FRONTEND_READY message to the backend!");
else
GST_DEBUG_OBJECT (src, "FRONTEND_READY was sent to the backend");
}
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE) {
return ret;
}
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
gst_mythtv_src_clear (src);
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
default:
break;
}
return ret;
}
static void
gst_mythtv_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMythtvSrc *mythtvsrc = GST_MYTHTV_SRC (object);
GST_OBJECT_LOCK (mythtvsrc);
switch (prop_id) {
case PROP_LOCATION:
if (!g_value_get_string (value)) {
GST_WARNING ("location property cannot be NULL");
break;
}
if (mythtvsrc->uri_name != NULL) {
g_free (mythtvsrc->uri_name);
mythtvsrc->uri_name = NULL;
}
mythtvsrc->uri_name = g_value_dup_string (value);
break;
case PROP_GMYTHTV_VERSION:
mythtvsrc->mythtv_version = g_value_get_int (value);
break;
case PROP_GMYTHTV_LIVEID:
mythtvsrc->live_tv_id = g_value_get_int (value);
break;
case PROP_GMYTHTV_LIVE:
mythtvsrc->live_tv = g_value_get_boolean (value);
break;
case PROP_GMYTHTV_ENABLE_TIMING_POSITION:
mythtvsrc->enable_timing_position = g_value_get_boolean (value);
break;
case PROP_GMYTHTV_LIVE_CHAINID:
if (!g_value_get_string (value)) {
GST_WARNING_OBJECT (object,
"MythTV Live chainid property cannot be NULL");
break;
}
if (mythtvsrc->live_chain_id != NULL) {
g_free (mythtvsrc->live_chain_id);
mythtvsrc->live_chain_id = NULL;
}
mythtvsrc->live_chain_id = g_value_dup_string (value);
break;
case PROP_GMYTHTV_CHANNEL_NUM:
mythtvsrc->channel_name = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (mythtvsrc);
}
static void
gst_mythtv_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMythtvSrc *mythtvsrc = GST_MYTHTV_SRC (object);
GST_OBJECT_LOCK (mythtvsrc);
switch (prop_id) {
case PROP_LOCATION:
g_value_set_string (value, mythtvsrc->uri_name);
break;
case PROP_GMYTHTV_VERSION:
g_value_set_int (value, mythtvsrc->mythtv_version);
break;
case PROP_GMYTHTV_LIVEID:
g_value_set_int (value, mythtvsrc->live_tv_id);
break;
case PROP_GMYTHTV_LIVE:
g_value_set_boolean (value, mythtvsrc->live_tv);
break;
case PROP_GMYTHTV_ENABLE_TIMING_POSITION:
g_value_set_boolean (value, mythtvsrc->enable_timing_position);
break;
case PROP_GMYTHTV_LIVE_CHAINID:
g_value_set_string (value, mythtvsrc->live_chain_id);
break;
case PROP_GMYTHTV_CHANNEL_NUM:
g_value_set_string (value, mythtvsrc->channel_name);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (mythtvsrc);
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "mythtvsrc", GST_RANK_NONE,
GST_TYPE_MYTHTV_SRC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"mythtv",
"lib MythTV src",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
/*** GSTURIHANDLER INTERFACE *************************************************/
static guint
gst_mythtv_src_uri_get_type (void)
{
return GST_URI_SRC;
}
static gchar **
gst_mythtv_src_uri_get_protocols (void)
{
static gchar *protocols[] = { "myth", "myths", NULL };
return protocols;
}
static const gchar *
gst_mythtv_src_uri_get_uri (GstURIHandler * handler)
{
GstMythtvSrc *src = GST_MYTHTV_SRC (handler);
return src->uri_name;
}
static gboolean
gst_mythtv_src_uri_set_uri (GstURIHandler * handler, const gchar * uri)
{
GstMythtvSrc *src = GST_MYTHTV_SRC (handler);
gchar *protocol;
protocol = gst_uri_get_protocol (uri);
if ((strcmp (protocol, "myth") != 0)
&& (strcmp (protocol, "myths") != 0)) {
g_free (protocol);
return FALSE;
}
g_free (protocol);
g_object_set (src, "location", uri, NULL);
return TRUE;
}
static void
gst_mythtv_src_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = gst_mythtv_src_uri_get_type;
iface->get_protocols = gst_mythtv_src_uri_get_protocols;
iface->get_uri = gst_mythtv_src_uri_get_uri;
iface->set_uri = gst_mythtv_src_uri_set_uri;
}
void
size_header_handler (void *userdata, const char *value)
{
GstMythtvSrc *src = GST_MYTHTV_SRC (userdata);
GST_DEBUG_OBJECT (src, "content size = %lld bytes", src->content_size);
}
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